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This article mainly introduces how php replaces js code, which is very detailed and has certain reference value. Friends who are interested must finish reading it!

Php to replace js code methods: 1, create a PHP sample file; 2, use the preg_replace regular matching function in php to replace and filter out the js code in the web page.

This article operating environment: Windows7 system, PHP7.1 version, Dell G3 computer.

How does php replace js code?

Php uses regular substitution to filter out js (script) code

Use the preg_replace regular matching function in php to filter out the js code in the web page. The fourth parameter in preg_replace () indicates the number of replacements. The default is-1, which means all replacements. If you only want to replace it twice, you can write it as preg_replace.

Matching rules cannot be used "/"

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